
Good Morning Lynda,
Firstly, I am by no means an expert, however, I would definitely reduce the amount of water in the recipe to 1/4 cup and employ 1/2 the Tamarind Juice or Pulp from Goya or other brand, to obtain a gorgeous thicker sauce ... One can always add water, to thin a sauce if needed.
My viewpoint ... Buy 2 jars or cans of the Juice and experiment with making the SALSA for the recipe, apart ... when you have obtained the sauce you prefer, then document it ...
TAMARIND PASTE: try calling a couple of your local Health Food Establishments or a Macy´s Cellar ...
Have nice wkend,
Margi. ( Saturday 13.00 hours. Madrid time. )